These 2 Ingredient Lemon Bars are the easiest lemon bars you'll ever make! All you need is a box of angel food cake and a can of lemon pie filling - sweet lemon flavor in a light and airy spongy cake-like texture lemon bar.
In a large bowl, add the lemon pie filling and dry angel food cake mix (do not prepare according to package directions). Gently mix it together until the two are well mixed and the batter starts to look wet and fluffy.
Spread the lemon bar batter evenly into an ungreased 9x13 baking dish. Bake for 20-25 minutes or until the cake is no longer jiggly and the top starts to very lightly brown. * If you're using an older, not non-stick pan (like a glass pan) you may want to very lightly spray it with cooking spray. I use the pan linked above in the recipe and don't spray it.
Remove the pan from the oven and allow it cool, on a cooling rack, for 30 minutes to 1 hour before slicing. Dust with powdered sugar, if wanted, and serve at room temperature.
Notes
Keep an eye on the bars around the 18-20 minute mark. They can brown rather quickly and you want to make sure they don't get too browned.
I used an ungreased USA Pan (my favorite brand found on Amazon) which has a silicone coating and is fairly nonstick on it's own. Most angel food cake recipes say to not grease the pan, which is why the recipe calls for the pan not to be greased, but if you are using an older, well-used pan then you may want to spray just a little bit of cooking spray to help the bars come out.
I like to sprinkle a light dusting of a little powdered sugar over top the bars before serving. Traditional lemon bars have a powdered sugar dusting because it helps balance out the tart lemon flavor, these 2 ingredient lemon bars that use a box of angel food cake mix are much sweeter than lemon bars, so you may find that you don't want the addition of more sugar. I like using it because it makes the bars pretty!